Determination of Zn in River Water

Introduction

In Notification No. 123 from Japanese Ministry of Environment (November 5, 2003), part of the environmental standards related to water pollution was amended. The amendment establishes total zinc as an additional environmental standard for maintenance of the environment, in particular, for aquatic life and its habitat and maintenance of a growth environment in public water regions. The standard is applicable to specified water regions. The criteria value differs depending on the type of water body, with 0.03mg/L or less for rivers and lakes, and 0.02 or 0.01mg/L or less for coastal waters. For the applicable analytical method, the industrial wastewater test method (JIS K0102) is used, including the following methods. 1. Flame atomic absorption method 2. Furnace atomic absorption method 3. ICP emission spectrometric method 4. ICP mass spectrometric method The present study examines the determination of zinc in river water standard samples JAC 0031 (non- spiked) and JAC 0032 (spiked), provided by the Japan Society for Analytical Chemistry, using flame atomic absorption (hereafter, flame method) and furnace atomic absorption (hereafter, furnace method).

April 25, 2005 GMT